Add testing instructions to README.rst
Add testing instructions to README.rst

dklyle/stackviz-ng,timothyb89/stackviz,dklyle/stackviz-ng,openstack/stackviz,timothyb89/stackviz-ng,timothyb89/stackviz,timothyb89/stackviz,openstack/stackviz,timothyb89/stackviz-ng,openstack/stackviz,timothyb89/stackviz-ng